Staircases

There are two staircases in my house.

Tom jogged down the narrow staircases.

The prefectural housing here is a five-story building with five staircases, designed to accommodate 10 families per staircase for 50 families in total.

In the last twenty years, partly due to Carpenter's innovations, strong new forms of glass have been developed that can be used as a structural material, whether for staircases, walkways or walls — transparent walls that admit sunlight, but are coated invisibly to keep out too much heat.